The coachman said, "Yes, yes;" and Rollo got into the coach. The coachman, without leaving his seat, reached his arm down and fastened the door and then drove away. He drove on through various crowded streets, which seemed to lead in towards the heart of the city, until at last the carriage came to the river. Rollo and Carlos looked out and saw the bridges, and the parapet wall which formed the river side of the street, with the book stalls, and picture stalls, and cake and fruit booths which had been established along the side of it, and the monstrous bathing houses which lay floating on the water below, all gayly painted and adorned with flags and little parterres of flowers; and the washing houses, with their long rows of windows, down close to the water, all filled with women, who were washing clothes by alternately plunging them in the water of the river and then banging them with clubs. These and a great many other similar objects attracted their attention as they rode along. If the reader of this book has the opportunity to look at a map of Paris, he will see that the River Seine, in passing through the town, forms two channels, which separate from each other so as to leave quite a large island between them. This island is completely covered with streets and buildings, some of which are very ancient and venerable. Here is the great Cathedral Church of Notre Dame; also the vast hospital called Hotel Dieu, where twelve thousand sick persons are received and taken care of every year. Here also is the prefecture of police--an enormous establishment, with courts, quadrangles, ranges, offices, and officers without number. In this establishment the records are kept and the business is transacted relating to all the departments of the police of the city; so that it is of itself quite a little town. The first indication which Rollo had that he had arrived at the place was the turning in of the coach under an arch, which opened in the middle of a very sombre and antique-looking edifice. The carriage, after passing through the arch, came into a court, where there were many other carriages standing. Soldiers were seen too, some coming and going and others standing guard. The carriage passed through this court, and then, going under another arch between two ponderous iron gates, it came into another court, much larger than the first. There were a great many carriages in this court, some moving in or out and others waiting. Rollo's carriage drove up to the farthest corner of the court; and there the coachman stopped and opened the door. Rollo got out. Carlos followed him. "Where do you suppose we are to go, Carlos?" said he. "Stop; I can see by the signs over the doors. Here it is. "Passports." This must be the place. We will go in here."